"Not Safe For Straights", a tag mostly used on twitter by gay people, used during and before Pride Month, users are not allowed to post any straight content under their tweets, or the kpop stans will go after you.
It started as a mockery of "Not Safe For Ramadan", but is now widely used across twitter and is now yearly occurrences.
Yo not cool bro my name says right there (NSFS), why are you replying with men fucking pussies on my tweets?
Near-Sighted-Freak
-Someone who has poor vision due to staying up very late while yelling at their sisters about nonsense, and during the day is an absolute mutant of the human nature. They are very aggressive and like to verbally arrange fights, but never actually follow through. All in all, they are people who you should avoid at all costs, although it is very easy and amusing to harass them.
MAN 1-dude, my neighbor over the weekend woke me up at 3.30 PM by yelling about markers, then the next day he threatened to tear both my ACL and MCL with a toothbrush, but couldn't see me very well.
MAN 2- ouch, you've got a bad case of an NSF as a neighbor.
An ancient word, usually it is found in old cyrillic or aramaic texts acompanied by a simple drawing of a bovine form and/or swords. It is often used to refer to a group of people that are "more 1337 than you", or a series of deviant sexual perversions.
"You suck, we are NSF!"
"So I got some glue, ballpoint pens, and teacups together last night and NSF'ed your mom!"